They must be golden PSU-s.
My 29,000 MH/s earns in
www.litecoinpool.org only 1.4 LTC a day.
0.024138 LTC per day.
You ask 5.68 LTC. It does 235 days to return, when electricity is free.
In order not to offend Your feelings, I'm not doing my offer right now. But I watch with interest, waiting for a cheaper price.